CN105099201A - Micro-power consumption single-ended flyback high-voltage power supply circuit - Google Patents
Micro-power consumption single-ended flyback high-voltage power supply circuit Download PDFInfo
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- CN105099201A CN105099201A CN201510416298.9A CN201510416298A CN105099201A CN 105099201 A CN105099201 A CN 105099201A CN 201510416298 A CN201510416298 A CN 201510416298A CN 105099201 A CN105099201 A CN 105099201A
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Abstract
The invention belongs to the field of a switching power supply, and relates to a micro-power consumption single-ended flyback high-voltage power supply circuit. The micro-power consumption single-ended flyback high-voltage power supply circuit comprises a micro controller unit (MCU), a metal oxide semiconductor (MOS) tube, a transformer, a rectification diode, a filter capacitor and a voltage division resistance, wherein a pulse width modulation (PWM) output pin of the MCU is connected with a grid the MOS tube VM1, a source of the MOS tube VM1 is grounded, a drain of the MOS tube is connected with a primary winding of the transformer, an anode of a power supply is connected with the other end of the primary winding of the transformer, an output end of a secondary winding of the transformer is connected with an anode the rectification diode VD1 and one end of the voltage division resistor R1, a cathode of the rectification diode VD1 is connected with one end of the filter capacitor C1, the other end of the filter capacitor C1 is grounded, the voltage division resistor R1 is connected in series with a resistor R2, the resistor R2 is connected in parallel with a bridging capacitor C2, one end of the filter capacitor C2 is connected with an analogue-digital (AD) sampling pin of the MCU, and the other end of the filter capacitor C2 is grounded. In the micro-power consumption single-ended flyback high-voltage power supply circuit, a single switching tube is used for controlling the transformer to achieve high-voltage output in a flyback working mode, and voltage feedback is carried out during instantaneous output period of the secondary winding of a flyback switching circuit; and the conduction time and periodic adaptive load change of the switching tube are rapidly adjusted through feedback voltage sampling, and energy loss is reduced.
Description
Technical field
The present invention relates to field of switch power, particularly relate to a kind of Micro Energy Lose single-ended reverse exciting high-voltage power circuit.
Background technology
Little with volume, the lightweight and high efficiency feature of Switching Power Supply is widely used in electronic equipment, is the indispensable a kind of power mode of current electronics and information industry develop rapidly.
At present, all can there is some weak point following in a lot of Switching Power Supply on the market:
1) circuit is comparatively complicated;
2) power consumption is higher, is difficult to be applicable to the lower occasion of product power consumption requirements.
This Micro Energy Lose single-ended reverse exciting high-voltage power circuit, periodically control conducting and the cut-off of controllable switch element, control transformer realizes High voltage output with flyback working method, carry out Voltage Feedback by the instantaneous output of flyback switching circuit vice-side winding, adjustment switching tube ON time and cycle adapt to load variations rapidly.Relative to existing switching power circuit, this circuit structure is simple, and output voltage stabilization, power consumption is ultralow.
Summary of the invention
The invention is characterized in, a kind of Micro Energy Lose single-ended reverse exciting high-tension circuit, comprising:
PWM output circuit, MCU etc. can the circuit of periodically output pwm signal;
Gate-controlled switch circuit, the controllable switch element such as metal-oxide-semiconductor, triode;
Flyback switching circuit, the elements such as transformer;
Output rectifier and filter, the rectifying and wave-filtering such as rectifier diode, filter capacitor element;
Feedback circuit, the element such as divider resistance, filter capacitor
Sample circuit, MCU etc. can carry out the circuit of voltage detecting;
DC power supply, electric energy needed for supply flyback switching circuit;
Wherein said PWM output circuit is connected with gate-controlled switch circuit, periodically controls conducting and the cut-off of controllable switch element; Winding one end, flyback switching circuit former limit is connected with positive source, and the other end is connected with gate-controlled switch circuit; Vice-side winding output is connected with feedback circuit and output rectifier and filter input; The output of feedback circuit is connected with the input of sample circuit; The output of output rectifier and filter is connected with load.
High voltage output is realized with flyback working method by single switching transistor control transformer.
By carrying out Voltage Feedback between the instantaneous period of output of flyback switching circuit vice-side winding.
Significantly reduce switching loss by sampled voltage feedback reduction on-off times and realize Micro Energy Lose.
Different amplitude high pressure is exported by sampled voltage feedback regulation on-off times is stable.
In order to prevent metal-oxide-semiconductor from bearing larger current and output voltage stabilization, the gate-controlled switch circuit turn-on time should be not long.Such as cycle 16us or shorter.
Feedback circuit divider resistance can multiplely be connected.Such as at least 2.
Sample circuit voltage detecting needs enough accuracy.Such as 8 or more high-precision AD sampling.
DC power supply can access different magnitudes of voltage according to different electric power systems.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of first embodiment of the invention;
Fig. 2 is the oscillogram of the pwm signal of first embodiment of the invention.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail, but not as a limitation of the invention.
As shown in Figure 1, the first embodiment of the present invention is, a kind of Micro Energy Lose single-ended reverse exciting high-voltage power circuit, comprises MCU, metal-oxide-semiconductor, transformer, rectifier diode, filter capacitor, divider resistance.
From power supply+V, power supply+V is connected with winding one end, transformer T1 former limit, and the transformer T1 former limit winding other end is connected with the drain electrode of metal-oxide-semiconductor VM1; The grid of metal-oxide-semiconductor VM1 connects the PWM output of MCU, and source electrode is connected to ground.
Transformer T1 secondary output is connected with rectifier diode VD1 anode and divider resistance R1 one end, and rectifier diode VD1 negative electrode is connected with filter capacitor C1 one end, filter capacitor C1 other end ground connection.Such as filter capacitor C1 is 100nF/630V.
From divider resistance R1, resistance R1 connects with resistance R2, and resistance R2 flying capcitor C2 is in parallel, and filter capacitor C2 one end and the AD of MCU pin of sampling is connected, its other end ground connection.Such as sampling capacitance C2 is 100pF.
As shown in Figure 1 and Figure 2, the I/O pin of MCU produces pwm signal, when exporting high level, the drain electrode of metal-oxide-semiconductor VM1 and source conduction, DC power supply+V is added on the former limit of transformer T1 and forms path, the winding conducting of transformer T1 former limit, vice-side winding induced voltage makes rectifier diode VD1 oppositely end, now energy storage is in transformer air gap, and vice-side winding does not have electric current, and load voltage is provided by filter capacitor C1.
When I/O pin output low level, the drain electrode of metal-oxide-semiconductor VM1 and source electrode are closed, now transformer T1 former limit winding and vice-side winding produce reverse voltage, vice-side winding induced voltage makes rectifier diode VD1 conducting, now be stored in energy transferring in transformer T1 air gap to vice-side winding and release to load, vice-side winding output voltage enters MCU and carries out AD sampling after resistance R1, R2 dividing potential drop, electric capacity C2 filtering simultaneously.
The foregoing is only embodiments of the invention; not thereby the scope of the claims of the present invention is limited; every utilize specification of the present invention and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (10)
1. a Micro Energy Lose single-ended reverse exciting high-voltage power circuit, comprising:
PWM output circuit, MCU etc. can the circuit of periodically output pwm signal;
Gate-controlled switch circuit, the controllable switch element such as metal-oxide-semiconductor, triode;
Flyback switching circuit, the elements such as transformer;
Output rectifier and filter, the rectifying and wave-filtering such as rectifier diode, filter capacitor element;
Feedback circuit, the element such as divider resistance, filter capacitor
Sample circuit, MCU etc. can carry out the circuit of voltage detecting;
DC power supply, electric energy needed for supply flyback switching circuit;
Wherein said PWM output circuit is connected with gate-controlled switch circuit, periodically controls conducting and the cut-off of controllable switch element; Winding one end, flyback switching circuit former limit is connected with positive source, and the other end is connected with gate-controlled switch circuit; Vice-side winding output is connected with feedback circuit and output rectifier and filter input; The output of feedback circuit is connected with the input of sample circuit; The output of output rectifier and filter is connected with load.
2. Micro Energy Lose single-ended reverse exciting high-voltage power circuit according to claim 1, is characterized in that: realize voltage by single switching transistor control transformer with flyback working method and export.
3. Micro Energy Lose single-ended reverse exciting high-voltage power circuit according to claim 1, is characterized in that: realize High voltage output by the instantaneous output of flyback switching circuit vice-side winding.
4. Micro Energy Lose single-ended reverse exciting high-voltage power circuit according to claim 1, is characterized in that: by carrying out Voltage Feedback between the instantaneous period of output of vice-side winding.
5. Micro Energy Lose single-ended reverse exciting high-voltage power circuit according to claim 1, is characterized in that: increase switch periods by sampled voltage feedback and significantly reduce switching loss and realize Micro Energy Lose.
6. Micro Energy Lose single-ended reverse exciting high-voltage power circuit according to claim 1, is characterized in that: export different amplitude high pressure by sampled voltage feedback regulation on-off times is stable.
7. Micro Energy Lose single-ended reverse exciting high-voltage power circuit according to claim 1, is characterized in that: described DC power supply can access different voltage according to different electric power systems.
8. Micro Energy Lose single-ended reverse exciting high-voltage power circuit according to claim 1, is characterized in that: in order to prevent metal-oxide-semiconductor from bearing larger current and output voltage stabilization, the gate-controlled switch circuit turn-on time should be not long.
9. Micro Energy Lose single-ended reverse exciting high-voltage power circuit according to claim 1, is characterized in that: described feedback circuit divider resistance can multiplely be connected.
10. Micro Energy Lose single-ended reverse exciting high-voltage power circuit according to claim 1, is characterized in that: described sample circuit needs enough precision.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510416298.9A CN105099201A (en) | 2015-07-11 | 2015-07-11 | Micro-power consumption single-ended flyback high-voltage power supply circuit |
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| CN201510416298.9A CN105099201A (en) | 2015-07-11 | 2015-07-11 | Micro-power consumption single-ended flyback high-voltage power supply circuit |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107026571A (en) * | 2016-12-26 | 2017-08-08 | 国网江西省电力公司电力科学研究院 | A kind of switching power unit |
| CN109765956A (en) * | 2018-12-07 | 2019-05-17 | 兰州空间技术物理研究所 | A kind of space field ionization source suitable for Sipm photo-multiplier |
| WO2020000844A1 (en) * | 2018-06-25 | 2020-01-02 | 格力电器（武汉）有限公司 | Switching power supply circuit |
| CN110752753A (en) * | 2019-11-04 | 2020-02-04 | 苏州大学 | Inverter booster circuit and booster |
| CN112152450A (en) * | 2020-09-22 | 2020-12-29 | 深圳市微特自动化设备有限公司 | Based on ADC and PWM closed-loop control adjustable power supply circuit and power supply unit |
| CN112366923A (en) * | 2020-12-02 | 2021-02-12 | 北京大华无线电仪器有限责任公司 | Isolated voltage sampling device |
| CN112910261A (en) * | 2021-01-20 | 2021-06-04 | 深圳市康弘环保技术有限公司 | Flyback type isolating switch power supply for alternating current motor drive compensation |
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| US4316242A (en) * | 1980-09-04 | 1982-02-16 | General Electric Company | Wide input range, transient-immune regulated flyback switching power supply |
| CN102931848A (en) * | 2012-11-20 | 2013-02-13 | 冠捷显示科技（厦门）有限公司 | High-efficiency flyback power supply system applicable to liquid crystal display products |
| CN104488182A (en) * | 2012-07-26 | 2015-04-01 | 奥斯兰姆施尔凡尼亚公司 | Flyback AC-TO-DC converter |
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2015
- 2015-07-11 CN CN201510416298.9A patent/CN105099201A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4316242A (en) * | 1980-09-04 | 1982-02-16 | General Electric Company | Wide input range, transient-immune regulated flyback switching power supply |
| CN104488182A (en) * | 2012-07-26 | 2015-04-01 | 奥斯兰姆施尔凡尼亚公司 | Flyback AC-TO-DC converter |
| CN102931848A (en) * | 2012-11-20 | 2013-02-13 | 冠捷显示科技（厦门）有限公司 | High-efficiency flyback power supply system applicable to liquid crystal display products |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107026571A (en) * | 2016-12-26 | 2017-08-08 | 国网江西省电力公司电力科学研究院 | A kind of switching power unit |
| WO2020000844A1 (en) * | 2018-06-25 | 2020-01-02 | 格力电器（武汉）有限公司 | Switching power supply circuit |
| CN109765956A (en) * | 2018-12-07 | 2019-05-17 | 兰州空间技术物理研究所 | A kind of space field ionization source suitable for Sipm photo-multiplier |
| CN110752753A (en) * | 2019-11-04 | 2020-02-04 | 苏州大学 | Inverter booster circuit and booster |
| CN112152450A (en) * | 2020-09-22 | 2020-12-29 | 深圳市微特自动化设备有限公司 | Based on ADC and PWM closed-loop control adjustable power supply circuit and power supply unit |
| CN112366923A (en) * | 2020-12-02 | 2021-02-12 | 北京大华无线电仪器有限责任公司 | Isolated voltage sampling device |
| CN112910261A (en) * | 2021-01-20 | 2021-06-04 | 深圳市康弘环保技术有限公司 | Flyback type isolating switch power supply for alternating current motor drive compensation |
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Application publication date: 20151125 |